Have a 89 Chevy 1/2 ton 2-wheel drive, with 4-speed trans., that just quit running today. Back in my day, if it got gas and spark, it would run. Well, it has spark and I sprayed starting fluid into carb and got no fire. It has TBI. So I think the fluid was pulled into carb. It was running and just quit. As we were doing about 40 MPH we droped it into 4th and it started again. Went on down to the store and shut it off. Came back out and it wouldn't start. We wern't far from home , so I went and got another truck to tow it with. While towing my brother tried it in geer again and it started. I was following him home when it started to die again. I noticed a gray'esh smoke comming out the exhaust. It also smelled like gas, but we couldn't find any leaks any where. Exhaust pipes look very black and sootey. But, no fire. Has spark and sprayed strating fluid in carb, no fire. Anyone have any ideas on this?